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Date: Wed, 8 Apr 2015 21:23:58 +0200
From: Fabian Frederick <fabf@...net.be>
To: linux-kernel@...r.kernel.org
Cc: Jan Kara <jack@...e.cz>, Fabian Frederick <fabf@...net.be>
Subject: [PATCH V2 8/9 linux-next] udf: propagate udf_get_filename() errors
-Return udf_get_filename() error from udf_readdir()
-Return -ENOMEM from udf_find_entry() when unable to allocate
fname and udf_get_filename() error
-udf_find_entry() callsites are also updated:
udf_lookup(), udf_rmdir(), udf_unlink() and udf_rename()
Suggested-by: Jan Kara <jack@...e.cz>
Signed-off-by: Fabian Frederick <fabf@...net.be>
---
V2:
-Don't set error in udf_readdir()
-Improve code flow
-Merge if(nfi) if (!inode) in udf_rename()
fs/udf/namei.c | 70 ++++++++++++++++++++++++++++++++++++++++++----------------
1 file changed, 51 insertions(+), 19 deletions(-)
diff --git a/fs/udf/namei.c b/fs/udf/namei.c
index dd648b7..891c067 100644
--- a/fs/udf/namei.c
+++ b/fs/udf/namei.c
@@ -167,8 +167,11 @@ static struct fileIdentDesc *udf_find_entry(struct inode *dir,
fibh->soffset = fibh->eoffset = f_pos & (sb->s_blocksize - 1);
if (dinfo->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB) {
if (inode_bmap(dir, f_pos >> sb->s_blocksize_bits, &epos,
- &eloc, &elen, &offset) != (EXT_RECORDED_ALLOCATED >> 30))
+ &eloc, &elen, &offset) != (EXT_RECORDED_ALLOCATED >> 30)) {
+ fi = ERR_PTR(-EINVAL);
goto out_err;
+ }
+
block = udf_get_lb_pblock(sb, &eloc, offset);
if ((++offset << sb->s_blocksize_bits) < elen) {
if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT)
@@ -179,19 +182,25 @@ static struct fileIdentDesc *udf_find_entry(struct inode *dir,
offset = 0;
fibh->sbh = fibh->ebh = udf_tread(sb, block);
- if (!fibh->sbh)
+ if (!fibh->sbh) {
+ fi = ERR_PTR(-EINVAL);
goto out_err;
+ }
}
fname = kmalloc(UDF_NAME_LEN, GFP_NOFS);
- if (!fname)
+ if (!fname) {
+ fi = ERR_PTR(-ENOMEM);
goto out_err;
+ }
while (f_pos < size) {
fi = udf_fileident_read(dir, &f_pos, fibh, cfi, &epos, &eloc,
&elen, &offset);
- if (!fi)
+ if (!fi) {
+ fi = ERR_PTR(-EINVAL);
goto out_err;
+ }
liu = le16_to_cpu(cfi->lengthOfImpUse);
lfi = cfi->lengthFileIdent;
@@ -234,13 +243,18 @@ static struct fileIdentDesc *udf_find_entry(struct inode *dir,
continue;
flen = udf_get_filename(sb, nameptr, lfi, fname, UDF_NAME_LEN);
+ if (flen < 0) {
+ fi = ERR_PTR(flen);
+ goto out_err;
+ }
+
if ((flen >= 0) && udf_match(flen, fname, child->len,
child->name))
goto out_ok;
}
-out_err:
fi = NULL;
+out_err:
if (fibh->sbh != fibh->ebh)
brelse(fibh->ebh);
brelse(fibh->sbh);
@@ -257,6 +271,7 @@ static struct dentry *udf_lookup(struct inode *dir, struct dentry *dentry,
struct inode *inode = NULL;
struct fileIdentDesc cfi;
struct udf_fileident_bh fibh;
+ struct fileIdentDesc *fi;
if (dentry->d_name.len > UDF_NAME_LEN - 2)
return ERR_PTR(-ENAMETOOLONG);
@@ -276,7 +291,11 @@ static struct dentry *udf_lookup(struct inode *dir, struct dentry *dentry,
} else
#endif /* UDF_RECOVERY */
- if (udf_find_entry(dir, &dentry->d_name, &fibh, &cfi)) {
+ fi = udf_find_entry(dir, &dentry->d_name, &fibh, &cfi);
+ if (IS_ERR(fi))
+ return ERR_CAST(fi);
+
+ if (fi) {
struct kernel_lb_addr loc;
if (fibh.sbh != fibh.ebh)
@@ -774,8 +793,11 @@ static int udf_rmdir(struct inode *dir, struct dentry *dentry)
retval = -ENOENT;
fi = udf_find_entry(dir, &dentry->d_name, &fibh, &cfi);
- if (!fi)
+ if (IS_ERR_OR_NULL(fi)) {
+ if (fi)
+ retval = PTR_ERR(fi);
goto out;
+ }
retval = -EIO;
tloc = lelb_to_cpu(cfi.icb.extLocation);
@@ -817,8 +839,12 @@ static int udf_unlink(struct inode *dir, struct dentry *dentry)
retval = -ENOENT;
fi = udf_find_entry(dir, &dentry->d_name, &fibh, &cfi);
- if (!fi)
+
+ if (IS_ERR_OR_NULL(fi)) {
+ if (fi)
+ retval = PTR_ERR(fi);
goto out;
+ }
retval = -EIO;
tloc = lelb_to_cpu(cfi.icb.extLocation);
@@ -1047,24 +1073,30 @@ static int udf_rename(struct inode *old_dir, struct dentry *old_dentry,
struct udf_inode_info *old_iinfo = UDF_I(old_inode);
ofi = udf_find_entry(old_dir, &old_dentry->d_name, &ofibh, &ocfi);
- if (ofi) {
- if (ofibh.sbh != ofibh.ebh)
- brelse(ofibh.ebh);
- brelse(ofibh.sbh);
+ if (IS_ERR(ofi)) {
+ retval = PTR_ERR(ofi);
+ goto end_rename;
}
+
+ if (ofibh.sbh != ofibh.ebh)
+ brelse(ofibh.ebh);
+
+ brelse(ofibh.sbh);
tloc = lelb_to_cpu(ocfi.icb.extLocation);
if (!ofi || udf_get_lb_pblock(old_dir->i_sb, &tloc, 0)
!= old_inode->i_ino)
goto end_rename;
nfi = udf_find_entry(new_dir, &new_dentry->d_name, &nfibh, &ncfi);
- if (nfi) {
- if (!new_inode) {
- if (nfibh.sbh != nfibh.ebh)
- brelse(nfibh.ebh);
- brelse(nfibh.sbh);
- nfi = NULL;
- }
+ if (IS_ERR(nfi)) {
+ retval = PTR_ERR(nfi);
+ goto end_rename;
+ }
+ if (nfi && !new_inode) {
+ if (nfibh.sbh != nfibh.ebh)
+ brelse(nfibh.ebh);
+ brelse(nfibh.sbh);
+ nfi = NULL;
}
if (S_ISDIR(old_inode->i_mode)) {
int offset = udf_ext0_offset(old_inode);
--
1.9.1
--
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